# Picrorhiza kurroa

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/picrorhiza-kurroa
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-19
**Evidence Score:** 6 / 10
**Category:** Ayurveda
**Also Known As:** Picrorhiza kurroa, Kutaki, Katuki, Kutki, Himalayan Gentian, Indian Gentian, Hellebore

## Overview

Picrorhiza kurroa is a Himalayan herb containing bioactive compounds picroside I and kutkoside that support [liver function](/ingredients/condition/detox) through hepatocyte protection. Clinical research demonstrates significant reduction in liver enzyme levels and bilirubin clearance in viral hepatitis patients.

## Health Benefits

• [Hepatoprotect](/ingredients/condition/detox)ion: RCT showed significant reduction in bilirubin levels (27.44 days vs 75.9 days placebo) in acute viral hepatitis (PMID: 9715310) - Moderate evidence
• [Anti-inflammatory](/ingredients/condition/inflammation) effects: Animal studies demonstrate suppression of TNF-α, IL-1β, IL-6 and NF-κB activation - Preliminary evidence
• [Immunomodulat](/ingredients/condition/immune-support)ion: Enhanced IFN-γ, IL-4, and lymphocyte proliferation at 12.5-50 mg/kg in animal models - Preliminary evidence
• Vitiligo support: 3-month trial (n=30) with 200mg twice daily showed benefits when combined with methoxsalen (PMID: 2615440) - Preliminary evidence
• Antimicrobial activity: In-vitro studies show activity against pathogens including Yersinia enterocolitica - Preliminary evidence

## Mechanism of Action

Picrorhiza kurroa's primary bioactives picroside I and kutkoside protect hepatocytes by stabilizing cell membranes and enhancing [antioxidant](/ingredients/condition/antioxidant) enzyme activity. The compounds suppress [pro-inflammatory cytokine](/ingredients/condition/inflammation)s TNF-α, IL-1β, and IL-6 through NF-κB pathway inhibition. Additionally, kutkoside stimulates bile acid production and promotes liver regeneration via hepatocyte growth factor activation.

## Clinical Summary

A randomized controlled trial in acute viral hepatitis patients showed picrorhiza extract significantly reduced bilirubin clearance time to 27.44 days compared to 75.9 days with placebo. The study involved 33 patients and demonstrated moderate evidence for [hepatoprotective](/ingredients/condition/detox) effects. Additional preliminary animal studies support [anti-inflammatory](/ingredients/condition/inflammation) mechanisms, though human data for inflammatory conditions remains limited. Current clinical evidence is strongest for liver support applications.

## Nutritional Profile

Picrorhiza kurroa is a medicinal herb used primarily for its bioactive phytochemical constituents rather than macronutrient content. **Primary Bioactive Compounds (Iridoid Glycosides — collectively termed 'Kutkin', typically 3–6% w/w of dried rhizome):** • Picroside I (4-hydroxy-3-methoxycinnamoyl catalpol): ~1.5–3.0% w/w — major [hepatoprotective](/ingredients/condition/detox) and [anti-inflammatory](/ingredients/condition/inflammation) constituent • Picroside II (vanilloyl catalpol): ~1.0–2.5% w/w — considered the principal marker compound; potent choleretic and hepatoprotective activity • Kutkoside (iridoid glycoside): ~0.5–1.5% w/w — contributes to [immunomodulatory](/ingredients/condition/immune-support) and anti-inflammatory properties • Picroside III and Picroside IV: trace to minor concentrations (~0.1–0.5%). **Other Bioactive Constituents:** • Cucurbitacin glycosides (cucurbitacin B, D, and R): trace amounts — contribute to anti-tumor and anti-inflammatory activity • Apocynin (acetovanillone): ~0.05–0.2% w/w — potent NADPH oxidase inhibitor with [antioxidant](/ingredients/condition/antioxidant) effects; well-characterized pharmacologically • D-mannitol (sugar alcohol): present in small amounts in rhizome • Vanillic acid and related phenolic acids: minor quantities contributing to antioxidant capacity • Androsin (phenolic glycoside): trace amounts. **Micronutrients & Minerals (approximate, per dried rhizome):** • Iron: ~2–5 mg/100g • Calcium: ~50–120 mg/100g • Magnesium: ~30–80 mg/100g • Zinc: ~1–3 mg/100g • Potassium: ~100–250 mg/100g. **Fiber & Macronutrients:** • Crude fiber: ~15–25% of dried rhizome • Crude protein: ~5–8% • Total ash content: ~4–7% • Moisture content (dried): ~8–12%. **Bioavailability Notes:** Picroside II demonstrates moderate oral bioavailability in animal models (~20–30%), with hepatic first-pass [metabolism](/ingredients/condition/weight-management) to its aglycone catalpol and vanillic acid. Kutkin (standardized mixture of picroside I and kutkoside, typically 60:40 ratio) shows enhanced absorption when taken with warm water or mild fat-containing vehicles, consistent with traditional Ayurvedic administration (anupana). Apocynin is rapidly absorbed orally with good systemic availability. Standardized extracts (e.g., Picroliv®, standardized to ≥60% kutkin/picroside content) are used in most clinical and pharmacological studies to ensure consistent bioactive delivery. The bitter iridoid glycosides also stimulate gastric acid and bile secretion, which may enhance absorption of co-administered nutrients.

## Dosage & Preparation

Clinical studies used 375-750mg three times daily (1,125-2,250mg/day total) for acute viral hepatitis. Rhizome powder: 300-500mg two to three times daily. Standardized extracts contained 2.72-2.88mg picroside I and 5.50-6.00mg picroside II per capsule. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Picrorhiza kurroa appears generally well-tolerated in clinical studies with minimal reported adverse effects. However, it may theoretically interact with hepatically-metabolized medications due to its effects on liver enzyme activity. Individuals with autoimmune conditions should exercise caution as the herb may modulate [immune system](/ingredients/condition/immune-support) function. Safety during pregnancy and lactation has not been established, so use should be avoided during these periods.

## Scientific Research

Human clinical evidence includes an RCT in acute viral hepatitis using standardized capsules (picroside I: 2.72-2.88mg, picroside II: 5.50-6.00mg) showing significant enzyme normalization (PMID: 9715310). Additional trials include double-blind studies with 375mg three times daily (n=15) and 750mg three times daily (n=20) showing hepatitis benefits without adverse effects, plus a vitiligo trial (n=30) over 3 months (PMID: 2615440).

## Historical & Cultural Context

Used in Ayurveda as Kutaki for over 2,000 years primarily for liver disorders including hepatitis and jaundice, as well as [inflammation](/ingredients/condition/inflammation), vitiligo, and respiratory issues. The bitter roots and rhizomes are key ingredients in traditional formulations like Arogyavardhini and are also utilized in Tibetan medicine for similar indications.

## Synergistic Combinations

Milk thistle, Alpha-lipoic acid, N-acetylcysteine, Turmeric, Schisandra

## Frequently Asked Questions

### How long does picrorhiza kurroa take to work for liver health?

Clinical studies show picrorhiza kurroa can reduce bilirubin levels significantly within 27 days for viral hepatitis patients. Individual response times may vary based on condition severity and dosage used.

### What is the active compound in picrorhiza kurroa?

The primary bioactive compounds are picroside I and kutkoside, which are iridoid glycosides responsible for the herb's hepatoprotective and anti-inflammatory effects. These compounds typically comprise 4-6% of standardized extracts.

### Can picrorhiza kurroa help with fatty liver disease?

While animal studies suggest potential benefits for fatty liver through anti-inflammatory mechanisms, human clinical trials specifically for fatty liver disease are lacking. The strongest human evidence exists for viral hepatitis recovery.

### What is the typical dosage of picrorhiza kurroa extract?

Clinical studies have used 375mg of standardized extract daily for hepatitis treatment. Dosages typically range from 200-400mg daily of standardized extract containing 4-6% picrosides, though optimal dosing requires further research.

### Does picrorhiza kurroa interact with liver medications?

Picrorhiza kurroa may theoretically interact with medications metabolized by the liver due to its effects on hepatic enzyme activity. Patients taking prescription liver medications should consult healthcare providers before use to avoid potential interactions.

### Is picrorhiza kurroa safe for children or the elderly?

Picrorhiza kurroa has been used traditionally in Ayurvedic medicine for various age groups, but clinical safety data specifically in children and elderly populations is limited. Most human studies have involved adult subjects, so dosing recommendations for pediatric or geriatric use should be determined in consultation with a healthcare provider. Traditional use suggests potential safety, but individual health conditions and concurrent medications should be evaluated before supplementation.

### What does clinical research show about picrorhiza kurroa's immune-boosting effects?

Animal studies demonstrate that picrorhiza kurroa enhances immune function by increasing interferon-gamma (IFN-γ) and interleukin-4 (IL-4) production, as well as promoting lymphocyte proliferation at doses of 12.5-50 mg/kg. These immunomodulatory effects suggest potential benefits for immune response, though human clinical trials specifically measuring immune outcomes remain limited. Current evidence is preliminary and primarily derived from preclinical research rather than large-scale human studies.

### Which form of picrorhiza kurroa extract is most effective?

Picrorhiza kurroa is standardized based on its active compounds, particularly picrosides, which are the key hepatoprotective constituents identified in clinical research. Standardized extracts allow for consistent dosing and reproducible effects, as demonstrated in the RCT showing reduced bilirubin levels in acute viral hepatitis. The extract form (rather than whole plant powder) appears more clinically relevant, though direct comparative studies between different formulation types are lacking.

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*Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com*
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